Topology Seminar: R.Jardine

  • Date: 05/17/2018
  • Time: 11:00

R.Jardine (Western University)


University of British Columbia


Pro-objects in geometry and topology


We start with a general introduction to pro-objects in topological and geometric settings, with descriptions of well-known examples, including Postnikov towers, absolute Galois groups, and etale homotopy types.

This is followed by a brief discussion of homotopy theories of pro-objects.

Homotopy theoretic techniques are applied to give the first correct comparison of finite descent and Galois cohomological descent for simplicial presheaves on the etale site of a field. Examples arise in the study of algebraic K-theory with finite coefficients over a field.

Other Information: 

Location: ESB 4133